Table 1.

Single-leg versus double-leg standing radiograph.

	Single-leg standing radiograph		Double-leg standing radiograph		Measurement difference		P-value
Radiological parameters	mean	standard deviation	mean	standard deviation	mean	95% confidence interval
JLOAF	−1.11°	2.41	−2.00°	2.15	0.88°	0.17°–1.60°	0.016*
JLOAM	0.76°	2.28	−0.48°	2.00	1.24°	0.52°–1.95°	0.001*
JLOAT	2.61°	2.60	0.85°	2.20	1.77°	1.12°–2.41°	<0.001*
MJLA	88.20°	1.75	87.57°	1.80	0.63°	0.37°–0.88°	<0.001*
MPTA	86.42°	2.49	86.13°	2.55	0.29°	−0.06°–0.64°	0.1
JLCA	3.49°	1.50	2.64°	1.27	0.85°	0.57°–1.13°	<0.001*
KAJA	−1.15°	3.59	−1.06°	3.73	−0.09°	−0.63°–0.46°	0.752
HKA	173.03°	3.07	174.14°	2.94	−1.11°	−1.38° to −0.84°	<0.001*

Statistical significance*.

Abbreviations: JLOAF, joint line orientation angle by femoral condyles; JLOAM, joint line orientation angle by middle knee joint space; JLOAT, joint line orientation angle by tibial plateau; MJLA, Mikulicz joint line angle; MPTA, medial proximal tibial angle; JLCA, joint line convergence angle; KAJA, knee ankle joint angle; HKA, hip-knee-ankle angle.